10 Causes of Sinus Infection
Reviewed: Dr. Mera
Cause #7: Sinus Anatomy
A sinus is an air-filled cavity located within the skull. There are four paired sinus cavities as follows: frontal sinus cavities, maxillary sinus cavities, sphenoid sinus cavities, and ethmoid sinus cavities.
About 10% of people have an extra sinus, which narrows the transitional space, increasing the possibility of developing a sinus infection. Also, some people have an anatomical variation, which makes their transitional space longer and narrower, predisposing them for sinus infections too.
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